Automatic feeding and punching mechanism



2 Sheets-Sheet l A. FRIEDMANN AUTOMATIC FEEDING AND PUNCHING MECHANISMFlled May 19, 1924 IIIIIIIIIJ May 1, 1928.

W INVENTOR.

ATTORNEYS.

May 1, 1928. 1,668,011

A. FRIEDMANN AUTOMATIC FEEDING AND RUNCHING MECHANISM Filed May 19, 19242 Sheets-Sheet 2 I g -3- l I Hie 4 2 T 17* 1 FF i 43 L L 1 i l l A L I2s 25 6/ w 1 5 7\ 1 E as 1 35 I l as INVENTOR BY WM ATTORN EYI PatentedMay 1, 1928.

UNITED STATES PATENT OFFICE.

mnnrrnmnmu, or wYoMIssING, BENNSYLVANIA.

AUTOMATIC FEEDING AND PUNCHING MECHANISM.

Application filed May 19,

My invention relates particularly to automatic feeding and punchingmechanism for facilitating quantity production of punched plain andshaped plates for structural and other uses.

My general purpose is to provide for most satisfactorily attaining thisobviously im portant purpose, by means of mechanism of simplifiedconstruction and operation. To this end my improved mechanism providesfor jointly carrying a sample-punched pattern plate; and a blank plateintended to be similarly punched, by means of a common carrier-table towhich successive feed movements are imparted under control of anautomatic stop-pin mechanism, and in accord with a like controlledselective punch mechanism adapted to operate upon the blank plate duringthe feed intervals, as herein after fully described in'connection withthe accompanying drawings illustrating a preferred embodiment of myinvention; the novel features of the invention being clearly defined inthe subjoined claims.

Fig. 1 is a side elevation of a mechanism embodying my invention; theview being in the direction of arrow l, Fig. 2, and the punch mechanismat the rear being shown partially in cross-section.

Fig. 2 is a plan view showing part of the punch machine broken away onthe line 2-2 of Fig. 1 so as to show the several punch gags.

Fig. 3 is an enlarged cross-sectional view on the line 3-3 of Fig. 1.

The feed table 15 is adapted to jointly carry a pattern plate B providedwith any required number of desiredly spaced apertures, and a blankplate C (dotted lines) in which corresponding apertures are to beautomatically punched in succession as the blank plate is moved indetermined steps under any number of selectively operative punches 10,10, carried in the reciprocated ram 11 of the punching machine. As shownthe blank plate C is suitably secured to the carrier table 15, whichdirectly carries the pattern plate B, by laterally extending table arms15 pivoted to table brackets 15; the two lates being laid fiat side byside, with the blank plate C in a somewhat higher plane and in advanceof the pattern plate as indicated, so that both plates are rigidlycarried by the table 15. The plate C only is passed under the punches10, the pattern plate B passing to one side of the latter an 1924.Serial 1%. 714 378.

der a stop mechanism which properly limits the successive feed'movementsof the carrier table 15 as hereinafter fully described.

As illustrated, D indicates a punchingmachine frame having its bedprovidedwith a changeable die block d, and with a series of antifriction rolls 16, 16 upon which the blank plate C is moved by thelaterally extended carrier table 15. The mam portion of carrier table 15is provided with wheels 20, 20 which run on parallel tracks21, 21forming part of an annex frame 23 arranged in fixed relation to thepunching machinel The joint step-bystep feeding movement of the patternand blank plates is effected, as shown, by a friction-connection 25having 'adjustably-tensioned slide plates 25, 25,-

frictionally engaging the opposite sides, of

- a depending longitudinal rib 15* of the carrier table 15; to whichconn'ectiona' regular reolprocating movement is imparted in. a suitableguideway 23 (Fig. 3) on the annex frame 23, and the frictional tensionof plates 25*, 25, being such as to grip and movethe rib 15 when thecarrier table is free to move, oito slide freely on said rib 15 when thecarrier table is held against movement.

This regular reciprocating movement of the friction-connection 25 isadapted'to impart an lrregular feeding movement tothe. car- 'rier table15 and its attached pattern plate B and blank plate G, as determined byengagement of one or more stop pins 30, 30,

with successive apertures in the pattern table 15; the stop-pins 30corresponding with the laterally spaced holes in the pattern B. Thesestop-pins are vertically guided in the frame portion 23? (Fig. 3), andare normally depressed by separate springs 30?, and

periodically raised by a cam 35 on shaft 36.

This shaft is regularly rotated in synchronism with the reciprocatedpunch 'ram'll, and is also provided with a feed cam 37 arranged tooperate the friction connection 25 through lever 38 and link 39. Theeccentric.

after each punching action of the ram 11 and preliminary to the feedmovement of the frictional connection 25. The latter movement carriesthe table 15 and pattern plate B forward under the raised pins, untilsprings 30 depress certain of the latter into a succeeding patternaperture.

The raising of the stop pins 30 to release the pattern plate B for thenext feed movement of table 15. is made to operate upon av gag mechanismfor the series of punches 10. This mechanism. as indicated. isessentially such as has been heretofore employed to determine the operativeness of the respective punches. each 50 being laterally slidable inthe punch block 51 so as to bring an aperture or recess 52 therein intoor out of alinement with a vertically' slidable punch 10 as indicated.and thereby maltethe latter ineffective or effective on a succeedingtroke of the ram. I provide that each of the upwardly extending stoppins 20. when raised. shall come into contact with a lever pivoted at56. so as to cause the opposite end of said lever to swing agag-contacting lever 57, and thereby inoperatively positioning thecorresponding gag 50.

hen the cam projection has passed the forwardly fed pattern plate B willsupport the pins in raised position until it is stopped by one or moreof the pins being automatically lowered into an alined pattern aperture;which lowering relea es the corresponding and permits its spring 53 toan automatically move it so as to make the corresponding punch 10operative.

The punched plate produced may be an exact duplicate of the patternplate P) or it may be a structural shape comprising a plate member inwhich like punehings are made. Both the pattern and blank plates aremoved forward by the friction feed device 25 until automatically stoppedby stop-pin engagement with the first hole or holes in the pattern plateB, the friction device 25 sliding idly on the table rib 15 for thebalance of its stroke. This plate engaging movement of the stoppins setsthe corresponding punch gags 50 to cause punching of like holes in theblank plate C as the punch ram descends: during which latter movementthe friction-feed connection 25 is idly returned to its startingposition. The stop pins are then raised by cam 35 to permit anotherforward frictionfecd movement, and to set the punch gags 50 intooperative position until they are released by automatic reengagement ofcertain of the pins with the next hole or holes in the pattern plate forthe next punching operation; and so on until the corresponding punchingof the blank plate is automatically completed. The stroke of thefriction feed device 25 is ordinarily greater than the longitudinalspaein of any succeeding holes, but two or more feed strokes may occurwithout any effective punching action. the complete re 'iroduction ofthe pattern punchings being in any case effected automatically.

The particular construction illustrated provides for duplicating in theblank plate at each action of the ram. a maximum of three transverselyalined apertures in the pattern plate: the spacing of, these beingol'iviously readily varied by r-orrespondiugly changing" the die block1/ and punch block 51. and the number of pm'urh s and stop pins employedbeing readily increa ed if required. As conveniently illustrated thereproduction is rcversely punched relative to the placed pattern plate.this merel involving reversal of one or the other plate. The simplemeans indicated in the drawings for returning the carrier table 15.comprises merely a hand operated pinion-wheel fil arranged in mesh witha tooth d rack til on the longitudinal rih 15 of the carrier table. if.and a hand lever 02 and catch (3?) for holding the stop pins in raisedposition; and there is no showing of drive connect ons to the punch ram.The feed mechanism comprising the table reciprocating mcans and the stopmechanism for determining its ell'ective action eoincidcntly with thecontrol of the eff ctive punch action. and other features specifi allydescribed may be embodied in modilied form without departing from thinvention as defined in the claims.

il hat I claim is:

1. In combination with a punch mechanism. and plate carrier table; atable-feed mechanism comprising a frictiunally enga 'ed reciprmrativedrive connection; and a pattern-engaging stop mechanism comprisiugslop-pins adapted to automatically (lelermine the effectivefeed-movement imparted to the tahle and the selective action of the pneh mechanism.

2.1Xn automatic feeding and punching mechanism comprising a. commoncarrier table for pattern-{muched and blank plates; :2 l'rictitiinallyengaged reciprocativc drive connection for said table; a stop-pin mechanism adapted to automatically engage and disengage successivelypresented holes in said pattern plate; punch mechanism for said blankplate; and means controlled by said pattern plate and stop-pin mechanismf r determinedly limiting successive feed ,movements to the earriertablcand simultaneously setting said punch mechanism.

3. In an automatic feeding and punching mechanism comprising a commoncarrier table for pattern-punched and blank plates, :1 stop-pinmechanism therefor adapted to automatically engage and disengagesuccessive holes in said pattern plate, punch mechanism for said blankplate operatively controlled in accord with said stop-pin mechanism; anda feed mechanism for said carrier table comprising a regularlyreciprocated and normally operative frictionally engaged connectioninoperatively slidable thereon when said stop-pin mechanism ispattern-engaged.

4. In an automatic feeding and punching mechanism comprising a commoncarrier table for pattern-punched and blank plates, a punch mechanismprovided with punch gags, means for imparting determined feed movementsto said table, means for selective ly limiting said feed movementscomprising automatically operated stop pins adapted to engage anddisengage pattern-apertures in the pattern-punched plate as the lattermoves with the carrier, gag positioning means, and mechanical meansoperatively connecting the gag positioning means and the stop pins, topermit the latter to control the gag positioning means by the apertureengaging and disengaging positioning of said stop pins.

5. In an automatic feeding and punching mechanism, a plate carriertable, a table feeding mechanism comprising a frictionally engagedreciprocative drive connection, a lever attached to said connection, camactuated means .for oscillating said leveryand a a pattern engaging stopmechanism comprising stop pins adapted to automatically determine theeliective feed movement imparted to the table and the selective actionof the punch mechanism. a

6. In an automatic feedin and punching mechanism, a carrier table iorpattern and blank plates, a stop mechanism including movable elementsadapted to engage the pattern plate, a common lever for moving all ofsaid elements in one direction, mechanical tioned by said stop pinmechanism, means for disengaging said stop pin mechanism andsimultaneously resetting said punch mechanism preliminary to asuccessive feed movement of the carrier table, means for returning thecarrier table to its'initial position, and means for locking the stoppin mechanism in inoperative position.

8. In an automatic feeding and punching mechanism, a common carriertable adapted to support and move a pattern plate and blank platearranged edge to edge, a transverse frame extending across said table, arocking leversupported by the frame, punch selecting gags, gagpositioning means controlled by said lever, reciprocating stop pinsengaging the lever for actuating the latter, a common lever foractuating all of the stop pins in one direction, means for continuouslyoscillating the last mentioned lever, and continuously operated meansfor intermittently feedingthe table forwardly.

In testimony whereof I afiix my signature.

ALBERT FRIEDMANN.

